CN107229093B - Side light type backlight module, light source and display panel thereof - Google Patents
Side light type backlight module, light source and display panel thereof Download PDFInfo
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- CN107229093B CN107229093B CN201710524481.XA CN201710524481A CN107229093B CN 107229093 B CN107229093 B CN 107229093B CN 201710524481 A CN201710524481 A CN 201710524481A CN 107229093 B CN107229093 B CN 107229093B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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Abstract
The invention discloses a side-light type backlight module, a light source and a display panel thereof. A light source of an edge-lit backlight module comprises: a plurality of light emitting units, each of which is arranged in a first direction; the light-emitting unit comprises a support, a chip bearing piece, a light-emitting chip and a packaging cover plate, wherein the packaging cover plate and the chip bearing piece are oppositely arranged; the light-emitting chip is arranged on the bearing plane of the chip bearing piece, the light of the light-emitting unit is emitted through the packaging cover plate, and the plane of the outer surface of the packaging cover plate is parallel to the first direction; the plurality of light emitting units comprise a first light emitting unit, wherein in the first light emitting unit, a bearing plane of the chip bearing piece and the first direction form an inclined included angle. The light source of the photometric backlight module provided by the invention can be suitable for the backlight module with left and right unfilled corners arranged on the light guide plate, and solves the problem of shadows at the left and right corners of the lower frame of the display area of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a side-light type backlight module, a light source thereof and a display panel.
Background
Fig. 1 is a schematic structural diagram of a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) in the prior art, and as shown in fig. 1, in the prior art, an IC (Integrated Circuit) 1 is required to be designed to drive a Display panel to Display, generally, the IC1 is connected to a gate line and a data line on a flexible Circuit board 3 and a TFT substrate 2, respectively, an IC1 is soldered on the TFT substrate 2 through a conductive adhesive, and an IC1 is generally disposed on a lower frame of the Display panel. At present, as the requirement for the screen ratio index in the industry is higher and higher, the IC1 arranged on the lower frame limits the narrowing of the lower frame of the display panel.
In the prior art, the right and left sides of the TFT substrate can be properly chamfered by adjusting the circuits of the right and left sides of the TFT substrate so as to improve the screen ratio index. In order to match the unfilled corners of the TFT, the relative position of the Light guide plate in the backlight module needs to be provided with unfilled corners of the same size, and according to the conventional design, fig. 2 is a schematic structural view of another TFT-LCD in the prior art, as shown in fig. 2, because of the influence of the unfilled corners of the Light guide plate 4 in the backlight module, taking the Light Emitting Diode (LED) as an example of the backlight module Light source, as shown in the area Q in fig. 2, part of the LED5 will exceed the backlight shape, and Light leakage will occur.
In order to solve the above problems, there is a scheme of reducing the number of LEDs in the light source in the prior art, and fig. 3 is a schematic structural diagram of another TFT-LCD in the prior art, as shown in fig. 3, reducing the number of LEDs will cause the distance between the edge-most LED5 and the side of the display area AA to be increased, and due to the limitation of the light emitting angle of the LED5, in this scheme, a shadow will be generated at the position Z corresponding to the unfilled corner of the backlight module, and further a shadow will be generated at the corresponding position Z at the left and right corners of the lower frame of the display area, which affects the display effect of the display area.
Therefore, it is an urgent need in the art to provide a side-light type backlight module, a light source thereof and a display panel for solving the shadow at the corner of the display area.
Disclosure of Invention
In view of this, the invention provides a side-light type backlight module, a light source thereof and a display panel, which solve the technical problem of shadow at the corner of a display area.
In one aspect, the present invention provides a light source of an edge-lit backlight module.
The light source of the side-light type backlight module comprises: a plurality of light emitting units, each of which is arranged in a first direction; the light-emitting unit comprises a support, a chip bearing piece, a light-emitting chip and a packaging cover plate, wherein the packaging cover plate and the chip bearing piece are oppositely arranged; the light-emitting chip is arranged on the bearing plane of the chip bearing piece, the light of the light-emitting unit is emitted through the packaging cover plate, and the plane of the outer surface of the packaging cover plate is parallel to the first direction; the plurality of light emitting units comprise a first light emitting unit, wherein in the first light emitting unit, a bearing plane of the chip bearing piece and the first direction form an inclined included angle.
In another aspect, the present invention provides an edge-lit backlight module for solving the above problems.
The side-light type backlight module comprises a light source and a light guide plate, wherein the light source is the light source of any one side-light type backlight module provided by the invention; the light guide plate comprises a first end face close to the light source, and a second end face and a third end face which are oppositely arranged in the first direction, and the first end face is parallel to the first direction; the light guide plate is provided with a notch, and the notch is positioned at the junction of the first end face and the second end face and/or the junction of the first end face and the third end face; the bearing plane of the chip bearing piece of the first light-emitting unit in the light source is inclined towards the unfilled corner.
In a third aspect, to solve the above technical problem, the present invention provides a display panel.
The display panel comprises any one of the side-light type backlight modules provided by the invention.
Compared with the prior art, the side-light type backlight module, the light source and the display panel thereof have the following beneficial effects that:
the light source of the side-light type backlight module provided by the invention is provided with a plurality of light-emitting units, wherein the light-emitting units comprise a first light-emitting unit, the bearing plane of the chip bearing piece of the first light-emitting unit has an inclined included angle with the first direction, so that the light-emitting angle of the first light-emitting unit is inclined, the light irradiation area of the light source is increased, and meanwhile, the light-emitting unit can be closely matched with the light guide plate, the light leakage is reduced, the light utilization rate is improved, the side-light type backlight module can be suitable for the backlight module with left and right unfilled corners on the light guide plate, the problem of dark shadows at the left and right corners of the lower frame of the display area of the display panel is solved, the two ends of the light incident.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a prior art TFT-LCD;
FIG. 2 is a schematic diagram of another prior art TFT-LCD configuration;
FIG. 3 is a schematic diagram of another prior art TFT-LCD configuration;
fig. 4 is a schematic view of a light source of an edge-lit backlight module according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a light-emitting unit according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a first light-emitting unit according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of another first light-emitting unit according to an embodiment of the invention;
FIG. 8 is a cross-sectional view of a prior art light-emitting unit;
FIG. 9 is a schematic view of a light emitting angle of the light emitting unit;
FIG. 10 is a simplified schematic diagram of an alternative embodiment of the first light emitting unit;
FIG. 11 is a simplified schematic diagram of an alternative embodiment of the first light emitting unit;
fig. 12 is a schematic diagram of an alternative embodiment of a light source of an edge-lit backlight module according to an embodiment of the invention;
fig. 13 is a schematic view of an edge-lit backlight module provided in this embodiment;
fig. 14 is a schematic view of a display panel according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 4 is a schematic view of a light source of an edge-lit backlight module according to an embodiment of the present invention.
As shown in fig. 4, the light source 10 includes: and a plurality of light emitting cells 11, each light emitting cell 11 being arranged in the first direction a.
Fig. 5-7 are specific structural diagrams of the light emitting unit 11, fig. 5 is a schematic diagram of the light emitting unit provided in this embodiment, fig. 6 is a schematic cross-sectional diagram of a first light emitting unit provided in this embodiment, and fig. 7 is a schematic cross-sectional diagram of another first light emitting unit provided in this embodiment.
As shown in fig. 5, the light emitting unit includes a support 111, a chip carrier (not shown, located inside the support 111, see fig. 6 and 7), a light emitting chip (not shown, located inside the support 111, see fig. 6 and 7), and a package cover 114. The material forming the package cover plate may be resin and phosphor.
As shown in fig. 6 and 7, the package cover 114 and the chip carrier 112 are disposed opposite to each other, and the package cover 114 is located above the chip carrier 112; the light emitting chip 113 is disposed on the supporting plane of the chip supporting member 112, and is connected to the chip supporting member 112 through a connecting wire L, light of the light emitting unit is emitted through the package cover plate 114, and a plane of an outer surface 1141 of the package cover plate 114 is parallel to the first direction a.
The light source provided by the embodiment includes a plurality of light emitting units including a first light emitting unit. As shown in fig. 6 and 7, the first light emitting unit includes: the chip carrier comprises a support 111, a chip carrier 112, a light emitting chip 113 and a package cover plate 114, wherein a carrier plane 1121 of the chip carrier 112 has an inclined included angle θ with the first direction a. It is understood that the supporting plane 1121 of the chip carrier 112 can be regarded as a surface of the chip carrier 112 near the side of the light emitting chip 113; if the surface of the chip carrier 112 close to the light emitting chip 113 and the surface of the chip carrier 112 far from the light emitting chip 113 are parallel to each other, the surface of the chip carrier 112 far from the light emitting chip 113 can be regarded as the supporting plane 1121 of the chip carrier 112.
In the light emitting unit, the light emitting angle of the light emitting chip 113 determines the light emitting angle of the light emitting unit, fig. 9 is a schematic view of the light emitting angle of the light emitting unit, in the conventional light emitting unit, as shown in fig. 8, fig. 8 is a schematic cross-sectional view of the light emitting unit in the prior art, the carrying plane of the chip carrier 112 is parallel to the first direction a, and the light emitting angle is F1, in the first light emitting unit 11A, the carrying plane of the chip carrier is disposed to have an inclined included angle θ with the first direction a, as shown in fig. 6 or fig. 7, compared with the case that the carrying plane of the chip carrier 112 is parallel to the first direction a, the light emitting angle of the light emitting chip 113 is inclined θ, and further the light emitting angle of the first light emitting unit 11A is inclined θ, and the light emitting angle of the first light emitting unit. In this embodiment, the position of the first light emitting unit 11A in the light source is not limited, and the first light emitting unit may be disposed at the edge of the light source along the first direction or in the middle of the light source. When the first light emitting unit 11A is disposed at the edge of the light source 10, the light emitting angle of the first light emitting unit is inclined, so that the light irradiation area at the edge of the light source is increased, and when the side-light type backlight module is formed by matching the first light emitting unit with the light guide plate having left and right unfilled corners, the light of the light source can irradiate left and right dark areas of the backlight module, thereby solving the problem of shadow falling at the lower frame corner of the display panel.
The light source of the side-light type backlight module provided by the invention is provided with a plurality of light-emitting units, wherein the light-emitting units comprise a first light-emitting unit, the bearing plane of the chip bearing piece of the first light-emitting unit has an inclined included angle with the first direction, so that the light-emitting angle of the first light-emitting unit is inclined, the light irradiation area of the light source is increased, and meanwhile, the light-emitting unit can be closely matched with the light guide plate, the light leakage is reduced, the light utilization rate is improved, the side-light type backlight module can be suitable for the backlight module with left and right unfilled corners on the light guide plate, the problem of dark shadows at the left and right corners of the lower frame of the display area of the display panel is solved, the two ends of the light incident.
Further, in some alternative embodiments, the light emitting units in fig. 4 are LED particles. The light-emitting unit using the LED particles as the light source has the advantages of low working voltage, high reliability, long service life and the like.
Further, in some alternative embodiments, the included inclination angle θ shown in fig. 6 and 7 is greater than 0 and less than 45 degrees. Inclination is too big, and luminous unit's support inner wall can shelter from the light in the luminous angle that the part sent the light chip, influences the light utilization ratio, and the utilization ratio of the light that sends the chip is guaranteed to reasonable the setting slope contained angle in 0 to 45 degrees within ranges.
Further, in some alternative embodiments, as shown in fig. 6 and 7, the bracket 111 has a first inner wall 1111 and a second inner wall 1112 opposite to each other in the first direction a, the chip carrier 112 is disposed between the first inner wall 1111 and the second inner wall 1112, a wall surface of the first inner wall 1111 and an outer surface 1141 of the cover 114 form a first included angle α 1, a wall surface of the second inner wall 1112 and the outer surface 1141 of the cover 114 form a second included angle α 2, and in the first light emitting unit, the first included angle α 1 and the second included angle α 2 are not equal.
Among the luminescence unit, the luminous angle of luminescence chip has decided the luminous angle of luminescence unit, in first luminescence unit, when the bearing plane that sets up the chip carrier has the slope contained angle with the first direction, through setting up first contained angle α 1 and second contained angle α 2 inequality, the first inner wall or the second inner wall of having guaranteed the luminescence unit do not shelter from the light in the luminous angle of luminescence chip, guarantee the utilization ratio of the light that the luminescence chip sent.
Further, in some alternative embodiments, as shown in fig. 6, in the first light emitting unit, the supporting plane 1121 of the chip carrier 112 is inclined toward the first inner wall 1111, the first included angle α 1 and the second included angle α 2 are both acute angles, and the first included angle α 1 is smaller than the second included angle α 2, wherein the supporting plane 1121 of the chip carrier 112 is inclined toward the first inner wall 1111, that is, one end of the supporting plane 1121 of the chip carrier 112 close to the first inner wall 1111 is inclined downward, and one end of the supporting plane 1121 of the chip carrier 112 close to the second inner wall 1112 is inclined upward, as shown in fig. 6.
Further, in some optional embodiments, in the first light emitting unit, a difference between the second included angle and the first included angle is greater than or equal to the inclined included angle and less than or equal to twice the inclined included angle.
In particular, in one aspect, fig. 10 is a simplified schematic diagram of an alternative embodiment of the first light emitting unit.
As shown in fig. 10, in the first light emitting unit, the supporting plane 1121 of the chip carrier has an inclined included angle θ with the first direction a, the supporting plane 1121 of the chip carrier is inclined toward the first inner wall 1111, in order to ensure that the first inner wall does not block the light ray within the light emitting angle of the light emitting chip, one end of the first inner wall 1111, which is close to the outer surface 1141 of the package cover plate, is inclined by γ 1 degree toward the direction away from the second inner wall 1112, the light emitting angle of the first light emitting unit is F2, the wall surface of the first inner wall 1111 and the outer surface 1141 of the package cover plate have a first included angle α 1, the wall surface of the second inner wall 1112 and the outer surface 1141 of the package cover plate have a second included angle α, wherein when ∠ γ 1< ∠ θ, the first inner wall may block a portion of the light ray emitted from the edge of the light emitting chip, and when ∠ γ 1 is ∠ θ, the light ray emitted from the edge of the light emitting chip just emits along the first inner wall 1111, so that ∠ γ 1 is not less than ∠ θ.
When the light emitting angle of the first light emitting unit is not tilted, as shown by the dotted line in fig. 10, that is, when the supporting plane 1121 of the chip carrier is not tilted with respect to the first direction a, the light emitting angle of the light emitting unit is F1, and a first included angle between the wall surface of the first inner wall 1111 and the outer surface 1141 of the package cover is equal to an included angle α 2 between the wall surface of the second inner wall 1112 and the outer surface 1141 of the package cover.
As shown in fig. 10, according to the external angle theorem, ∠α 1< ∠α 2, ∠α 31 and ∠α 42 are both acute angles, ∠α 02 is ∠α 1 α 1+ ∠α 2 γ 1, and ∠ γ 1 is not less than ∠ θ, so ∠ α 2- ∠α 1 is not less than γ 1, that is, in the first light-emitting unit, the difference between the second included angle α 2 and the first included angle α 1 is not less than or equal to the inclined included angle θ.
In another aspect, fig. 11 is a simplified schematic diagram of an alternative embodiment of the first light-emitting unit.
As shown by the dotted line in fig. 11, when the light emitting angle of the first light emitting unit is not tilted, that is, when the supporting plane 1121 of the chip carrier has no tilted included angle with the first direction a, the light emitting angle of the light emitting unit is F1, and a first included angle between the wall surface of the first inner wall 1111 and the outer surface 1141 of the package cover is equal to an included angle α between the wall surface of the second inner wall 1112 and the outer surface 1141 of the package cover.
As shown by a solid line in fig. 11, in the first light emitting unit, the carrying plane 1121 of the chip carrier has an inclined angle θ with the first direction a, the carrying plane 1121 of the chip carrier is inclined toward the first inner wall 1111, in order to ensure that the first inner wall does not block light rays within the light emitting angle of the light emitting chip, one end of the first inner wall 1111, which is close to the outer surface 1141 of the package cover plate, is inclined by γ 1 degrees toward the direction away from the second inner wall 1112, and at the same time, one end of the second inner wall, which is close to the outer surface 1141 of the package cover plate, is inclined by γ 2 degrees toward the first inner wall, the light emitting angle of the first light emitting unit is F2, the wall surface of the first inner wall 1111 and the outer surface 1141 of the package cover plate have a first angle α, and the wall surface of the second inner wall 1112 and the outer surface 1141 of the package cover plate have a second angle α 2, wherein when α γ 1< 37 γ 1 θ or α γ 2> α θ 3 θ, when γ 1 is equal to 8938 γ 1< 9648 γ 1, the first inner wall 1111 or the second light rays may block a portion of the light rays 3919, so that the light rays are emitted from the inner wall ∠, the inner wall ∠ and γ 2, and the inner wall may block the light rays 359 γ 2 when γ 2, the light rays are preferably equal to or equal to.
As shown in fig. 11, according to the external angle theorem, ∠α 2 ═ ∠α + ∠α 1 γ 2, ∠α 0 ═ ∠α 2 ∠α 61+ ∠α 3 γ 1, so ∠α 4 ∠α 72- ∠α 5 α 1 ═ ∠ α + ∠ γ 2- (∠α - ∠ γ 1) ═ 2 +. suburb 1 ≦ 2 ═ γ 1 ═ 2 ═ θ, that is, in the first light-emitting unit, the difference between the second included angle α 2 and the first included angle α 1 is less than or equal to twice the inclination included angle θ.
Further, in some alternative embodiments, referring to fig. 5 to 7, the light emitting unit further includes a fixed connector 115 located outside the bracket 111, and the fixed connector 115 is connected to the chip carrier; the light-emitting unit is fixed on the flexible circuit board by the fixed connecting piece 115 in a welding mode, the light-emitting chip in the light-emitting unit is connected to the flexible circuit board through the connecting wire L, the chip bearing piece and the fixed connecting piece, and the light-emitting chip can emit light after being electrified.
Further, in some optional embodiments, fig. 12 is a schematic view of a light source of the edge-lit backlight module provided in the embodiments of the present invention, as shown in fig. 12, the light source further includes a flexible circuit board 12, and the light emitting unit 11 is disposed on the flexible circuit board 12; in the first direction a, the flexible circuit board 12 includes a first end portion DB1 (i.e., a left side edge of the light source in fig. 12), a middle portion ZB, and a second end portion DB2 (i.e., a right side edge of the light source in fig. 12); the plurality of light emitting units 11 include a plurality of first light emitting units 11A and a plurality of second light emitting units 11B, in the second light emitting units 11B, the carrying plane of the chip carrier is parallel to the first direction, wherein a schematic cross-sectional view of the second light emitting units 11B is shown with reference to fig. 8.
The middle ZB of the flexible circuit board 12 is provided with a second light emitting unit 11B, and the first end DB1 and the second end DB2 of the flexible circuit board 12 are each provided with a first light emitting unit 11A; in the first light-emitting unit 11A located at the first end DB1, the cross-sectional schematic view of the first light-emitting unit 11A is shown with reference to fig. 6, the carrying plane of the chip carrier is inclined in a direction from the middle toward the first end DB1 (i.e., the carrying plane 1121 of the chip carrier 112 is inclined toward the first inner wall 1111), and in the first light-emitting unit 11A located at the second end DB2, the cross-sectional schematic view of the first light-emitting unit 11A is shown with reference to fig. 7, the carrying plane of the chip carrier is inclined in a direction from the middle toward the second end DB2 (i.e., the carrying plane 1121 of the chip carrier 112 is inclined toward the second inner wall 1112).
In the light source of the edge-lit backlight module provided by this embodiment, the supporting plane of the chip supporting member is arranged at the first end of the light source and is inclined towards the direction from the middle part to the first end, and the light emitting angle of the first light emitting unit is inclined towards the direction of the first end, so that the light irradiation area in the direction of the first end of the light source is increased; set up the bearing plane of chip carrier to the direction slope by the directional second tip in middle part at the second tip of light source, the luminous angle of first luminescence unit inclines to second tip direction, the light irradiation area of light source second tip direction has been increased, the light source of side light formula backlight unit that this embodiment provided, can constitute backlight unit with the light guide plate that sets up the unfilled corner about with, edge corner shadow problem about in solving backlight unit, and then shadow problem about solving display panel lower frame, need not to do the oblique angle design with the both ends of the income light side of light guide plate, can reduce the light guide plate production and the optical effect and handle the degree of difficulty, promote display panel's display effect, be applicable to the design that display panel lower frame narrows down.
Further, in some alternative embodiments, in the light source of the edge-type backlight module shown in fig. 12, in the first direction a from the first end portion DB1 to the middle portion ZB, the inclined angles of the first light-emitting units 11A located at the first end portion DB1 decrease in sequence, and the inclined angles of the first light-emitting units 11A located at the second end portion DB2 increase in sequence, where the inclined angles are the angles between the carrying plane of the chip carrier and the first direction, and a part of light emitted from each light-emitting unit overlaps with a part of light emitted from the adjacent light-emitting units on the left and right sides, and the inclined angles of the first light-emitting units on the left and right sides of the light source change in sequence, so that the uniformity of light emitted from the light source of the edge-type backlight module toward the light guide plate direction is ensured.
This embodiment provides a light source of side light formula backlight unit can constitute backlight unit with the light guide plate of controlling setting unfilled corner, edge corner shadow problem about solving backlight unit in the light guide plate, need not to do the oblique angle design with the both ends of the income light side of light guide plate, can reduce the light guide plate production and the optical effect and handle the degree of difficulty, has guaranteed the homogeneity of light source emergent light simultaneously, further promotes display panel's display effect.
Further, in some alternative embodiments, referring to fig. 6, an included angle between a wall surface of the first inner wall 1111 and a wall surface of the second inner wall 1112 of the light emitting unit is 120 degrees. The included angle between the wall surface provided with the first inner wall 1111 and the wall surface provided with the second inner wall 1112 is 120 degrees, the light of the edge part emitted by the light emitting chip can be ensured to be emitted along the wall surface of the first inner wall 1111 and the wall surface of the second inner wall 1112, the light emitting range of the light emitting unit is large, a plurality of light emitting units are arranged along the first direction in the light source shown in fig. 12, partial light can be superposed with partial light emitted by the left and right adjacent light emitting units when the light emitted by each light emitting unit is emitted, the light emitting range of the light emitting unit is large, and the uniformity of the light emitted by the light source of the side light type backlight module and emitted to the light guide plate direction.
The invention further provides an edge-lit backlight module, fig. 13 is a schematic view of the edge-lit backlight module provided in this embodiment, as shown in fig. 13, the edge-lit backlight module includes a light source 10 and a light guide plate 20, the light source 10 is a light source of the edge-lit backlight module described in any one of the embodiments above; the light guide plate 20 includes a first end face 201 close to the light source 10, and a second end face 202 and a third end face 203 oppositely disposed in a first direction a, the first end face 201 being parallel to the first direction a; the light guide plate 20 has a notch 204, the notch 204 is located at a boundary between the first end surface 201 and the second end surface 202 and/or a boundary between the first end surface 201 and the third end surface 204, and fig. 13 shows a case where the notch 204 is located at both the boundary between the first end surface 201 and the second end surface 202 and the boundary between the first end surface 201 and the third end surface 204; the carrier plane of the chip carrier of the first light-emitting unit 11A in the light source is inclined to the unfilled corner 204. In the edge-light type backlight module provided by this embodiment, the bearing plane of the chip bearing member of the first light-emitting unit 11A in the light source is inclined toward the unfilled corner 204, and the light-emitting angle of the first light-emitting unit 11A is inclined toward the unfilled corner 204, so that the light irradiation area in the unfilled corner 204 direction is increased, the problem of dark shadow at the corner of the unfilled corner in the light guide plate in the backlight module is solved, the display area AA of the display panel has a good display effect, and the display panel with a narrow lower frame BA is favorably manufactured. Meanwhile, the outer surface of the packaging cover plate of the first light-emitting unit is parallel to one end face of the light guide plate, so that the first light-emitting unit and the light guide plate are in close and opposite structural arrangement, light leakage is reduced, and the light utilization rate of the first light-emitting unit is improved.
An embodiment of the present invention further provides a display panel, including the above edge-lit backlight module, and fig. 14 is a schematic view of the display panel according to the embodiment of the present invention, and the display panel shown in fig. 14 includes a display area AA and a frame area BA. The display panel that this embodiment provided, in side light type backlight unit's the light source, the first luminescence unit that has the slope contained angle including the bearing plane of chip carrier and first direction for the luminous angle slope of first luminescence unit has increased the light irradiation area of light source, solves the display panel lower frame and controls corner shadow problem, promotes display panel's display effect, and the display panel that this embodiment provided has the narrow little characteristics of lower frame.
By the above embodiments, the edge-lit backlight module, the light source and the display panel thereof of the invention have the following beneficial effects:
the light source of the photometric backlight module provided by the invention is provided with a plurality of light-emitting units, wherein the light-emitting units comprise a first light-emitting unit, the bearing plane of the chip bearing piece of the first light-emitting unit forms an inclined included angle with the first direction, so that the light-emitting angle of the first light-emitting unit is inclined, the light irradiation area of the light source is increased, and meanwhile, the light-emitting unit can be closely matched with the light guide plate, the light leakage is reduced, the light utilization rate is improved, the light source is suitable for the backlight module with left and right unfilled corners on the light guide plate, the problem of dark shadows at the left and right corners of the lower frame of the display area of the display panel is solved, the two ends of the light incident side of the light guide plate are not.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (8)
1. A side-light type backlight module is characterized by comprising a light source and a light guide plate; the light source includes: a plurality of light emitting cells, each of the light emitting cells being arranged in a first direction;
the light-emitting unit comprises a support, a chip bearing piece, a light-emitting chip and a packaging cover plate, wherein the packaging cover plate and the chip bearing piece are oppositely arranged;
the light-emitting chip is arranged on the bearing plane of the chip bearing piece, the light of the light-emitting unit is emitted through the packaging cover plate, and the plane of the outer surface of the packaging cover plate is parallel to the first direction;
the plurality of light-emitting units comprise a first light-emitting unit and a second light-emitting unit, wherein in the first light-emitting unit, a bearing plane of the chip bearing piece and the first direction form an inclined included angle, and in the second light-emitting unit, the bearing plane of the chip bearing piece and the first direction are parallel;
the light guide plate comprises a first end face close to the light source, and a second end face and a third end face which are oppositely arranged in the first direction, wherein the first end face is parallel to the first direction;
the light guide plate is provided with a notch, and the notch is positioned at the junction of the first end face and the second end face and/or the junction of the first end face and the third end face;
the bearing plane of the chip bearing piece of the first light-emitting unit in the light source inclines towards the unfilled corner;
the length of the first end face in the first direction is smaller than the distance between the second end face and the third end face in the first direction, the first light-emitting unit and the second light-emitting unit are both arranged corresponding to the first end face, and the outer surface of the packaging cover plate of the first light-emitting unit is parallel to the outer surface of the packaging cover plate of the second light-emitting unit;
in the first direction, a minimum distance between the first light emitting unit and the unfilled corner is smaller than a minimum distance between the second light emitting unit and the unfilled corner;
the support is provided with a first inner wall and a second inner wall which are oppositely arranged in the first direction, and the chip bearing piece is arranged between the first inner wall and the second inner wall;
the wall surface of the first inner wall and the outer surface of the packaging cover plate form a first included angle, and the wall surface of the second inner wall and the outer surface of the packaging cover plate form a second included angle;
in the first light emitting unit, the bearing plane of the chip bearing member inclines towards the first inner wall, the first included angle and the second included angle are acute angles, the first included angle is smaller than the second included angle, and the difference between the second included angle and the first included angle is larger than or equal to the inclined included angle and smaller than or equal to twice the inclined included angle.
2. The edge-lit backlight module of claim 1,
the light-emitting unit further comprises a fixed connecting piece positioned outside the bracket, and the fixed connecting piece is connected with the chip bearing piece;
the fixed connecting piece is used for fixing the light-emitting unit on the flexible circuit board.
3. The edge-lit backlight module of claim 1,
the light source also comprises a flexible circuit board, and the light emitting unit is arranged on the flexible circuit board;
in the first direction, the flexible circuit board comprises a first end part, a middle part and a second end part;
the second light-emitting unit is arranged in the middle of the flexible circuit board, and the first light-emitting unit is arranged at the first end part and the second end part of the flexible circuit board;
in the first light-emitting unit at the first end portion, the carrier plane of the chip carrier is inclined in a direction from the central portion toward the first end portion, and in the first light-emitting unit at the second end portion, the carrier plane of the chip carrier is inclined in a direction from the central portion toward the second end portion.
4. The edge-lit backlight module of claim 3,
in a first direction in which the first end portion points to the middle portion, the inclined included angles of the first light-emitting units located at the first end portion are sequentially reduced, and the inclined included angles of the first light-emitting units located at the second end portion are sequentially increased.
5. The edge-lit backlight module of claim 1, wherein the included tilt angle is greater than 0 and less than 45 degrees.
6. The edge-lit backlight module of claim 1, wherein the light-emitting units are LED particles.
7. The edge-lit backlight module of claim 1,
the included angle between the wall surface of the first inner wall and the wall surface of the second inner wall is 120 degrees.
8. A display panel comprising the edge-lit backlight module of any one of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710524481.XA CN107229093B (en) | 2017-06-30 | 2017-06-30 | Side light type backlight module, light source and display panel thereof |
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| CN201710524481.XA CN107229093B (en) | 2017-06-30 | 2017-06-30 | Side light type backlight module, light source and display panel thereof |
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| CN107229093B true CN107229093B (en) | 2020-05-22 |
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| CN110109213A (en) * | 2019-05-05 | 2019-08-09 | Oppo广东移动通信有限公司 | Backlight module and electronic equipment with it |
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| TW201032348A (en) * | 2009-02-20 | 2010-09-01 | Chi Mei Lighting Tech Corp | Light-emitting diode package structure, light-emitting unit and backlight module |
| CN102130105A (en) * | 2009-12-21 | 2011-07-20 | Lg伊诺特有限公司 | Light emitting device and light unit using the same |
| CN102705744A (en) * | 2012-06-15 | 2012-10-03 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) lamp strip and lateral-entering type backlight module using same |
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